Hi All, I've a small container of size 6"x6"x6" that holds some liquid whose quantity I need to monitor from time to time. I know I can use a PIC to read the output of a strain gauge that measures the weight of the container (liquid), but I don't want to do so, since I have no skill to build the complex mechanical structure that fasten the strain gauge while allowing it to displace slightly for creating some deformation. Is there any simple way to do the measurement? The measured results don't need to be accurate, I'm just comparing roughly the change in quantity with time against the original set value. 
 
Thanks in advance! John
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